Improvement in automatic rakes for harvesters



UNITED STATES ISAAC C. TWINING, OF WRIG HTSTOWN, PENNSYLVANIA.

IMPROVEMENT IN AUTOMATIC RAKES FOR HARVESTERS.

Specification forming part of Letters Patent No. 29.640, (laied August 14, 1860.

To all whom it may concern:

Be it known that I, ISAAC C. TWINING, of ldfrightstown, in the county ofBucks and State of Pennsylvania, have invented a new and Ilnproved Baking Device for Harvesters; and I do hereby declare'that the following is a full, clear, and exact description of the same, reference beinghad to the annexed drawings, making a part of this specification, in which- Figurel is aside sectional view ofa harvester with my invention applied to it, me, Fig. 3,1'11- dicating the plane of section; Fig. 3, a back sectional view of the same taken in the line y, y, Fig. 1; Fig. 3, a plan or top view ofthe same.

Similar letters of reference indicate corresponding parts ill the several igures.

This invention relates to all inlprovementin that class of raking devices in which a vibrati-ng rake is employed and arranged to sweep over the platform in the arc of a circle.

The within-described invention consistsin a novel alld improved means for operating the rake, substantially as hereinafter shown and described, whereby the two movements necessary to be given to the rake-to wit, the vibrating and the rising-and-fallillg one-maybe obtained in a very simple and economical way, and the rake lnade to operate intermittingly when necessary.

To enable those skilled ill the art to fully understand and construct myinvent-ion, I will proceed to describe'it.

A represen ts the main frame of a harvester, and B the platform.

G is the driving or ground wheel, and D a caster-wheel,which supports the front end ofa plank on which the drivers seat is placed,the back end of said plank being attached to the main frame A.

The sickle E, which may be of the usual reciprocating kind, is attached to the front end of the platform, which is curved at its outer side to correspond with the arc described by the rake in its movement.

The above parts may all be constructed and arranged in the'usual way, and therefore do not require a minute description. Y

On the axle F ot' the wheel C thereis placed a wheel, G, having a portion or section of its periphery toothed, as shown at a. On the axle F there is also placed a cam, H, and a wheel, I, the latter havin g only a portion or section of its periphery toothed, as shown at b. The

wheel is allowed to Slide on nl@ axle E, but is connected to it by a feather and groove, so as V to turn with the axle. Between the wheel I and the cam H there is placed a spiral spring, c,which has a tendency to keep the wheel Ioff from the cam H. On theinner end of the axle F there is placed a pinion, d, into which a pinion, e, on a shaft, j', gears. To the outer side of the pinion etllere is attached acam,g, against which a lever, G,is pressed bythe spiralspring c, the back end ot' said lever being attached to the back part of the main frame A. The front end of the lever Gis forked and is fitted on the axle F, and has the wheel I pressed againstit by the spiral spring c. (See Figs. 2 and 3.)

In the main frame A there is placed avertical shaft, J, on which there is a wheel, K,hav ing two sections or portions, h 7l, of its periphery toothed, said toothed portion being at opposite sides of the wheel, as shown in Fig. 3.

To the upper surface of the wheel K there is attached by a joint, i, a rake-bar, L. The joint i admits of the bar L rising and falling in a vertical plane, and said joint, being near the periphery of the wheel K, the latter serves as a crank for the rake-bar, as will be presently described. The inner end of the rake-bar has a metal link or strap, a", attached, through which the shaft J passes. Theouter end of the bar L has a rake, M, attached, the length of which is equal to the width of the platform B.

On the vertical shaft J there is placed a bent sliding bar, 0, the lower part of which rests on the cam H, the upper part sustaining the rakebar L.

The operation is as follows:l As the machine is drawn along the toothed portions ab of the wheels Gr I gear alternately with the wheel K and give avibrating lnotion to the rake-barL and rake M, the wheel I moving the rake forward to the front end of the platform and the wheel N movin g it backward. Previous to eacll forward movement of the rake the cam H elevates the rake-bar and retains it in an elevated position while it is moving forward, the cam allowing the rake to fall at the termination of lts forward stroke or movement. moves backward it is in contact with the platform, and the cut grain is raked therefrom. As the rake reaches the termination ofits back-` ward movement the bar L is elevated, preparatory to its forward movement, by the action of the cam H on bar O. The forward movement As the rake ot' the rake does not always` take place immediately at the termination ofits backward movement, for the cam g must rst throwthe wheel I in contact with wheel K, and said cam is so formed as to allow the rake to dwellor rest a certain time before moving forward. This arrangement admits of the platform receiving aneeessary amount of grain to form a gavel before being taken oft'. In cases, however,where there are heavy crops, thevwheel I may be kept up to wheel K by means of a pin or key, and no cessation of movement allowed the rake. Thus it will be seen that by a very simple arrangement of means the desired movements are given the rake.

I would remark that pinion e, with cam g,

may be shifted beyond contact with the leverv Gr, said lever being extended within reach of the driver, thus placing the movements ot' the is obvious and mayin many eases be dispensed with entirely.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement of the wheels I K G, toothed at their peripheries in sections, in connection with the bent bar O, cam El, and rakebar L, attached to the upper surface of the wheel K, substantially as and for the purpose set forth.

2. The arrangement, with the wheel I, of the pinions (l e, cam g, and lever G and spring c, substantially as shown,for the purpose of giving the necessary dwells orcessations of movement to the rake, as and for the purpose set forth.

ISAAC C. TWINING.

Witnesses:

EDWARD ATKINSON, FRANoIs B. THOMPSON. 

